Open AccessDesign of nanowire-induced nanocavities in grooved 1D and 2D SiN photonic crystals for the ultra-violet and visible ranges
Author(s) -
Sylvain Sergent,
Masato Takiguchi,
Hideaki Taniyama,
Akihiko Shinya,
Eiichi Kuramochi,
Masaya Notomi
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.026792
Subject(s) - nanowire , photonic crystal , materials science , optics , refractive index , finite difference time domain method , optoelectronics , photonics , whispering gallery wave , nanophotonics , silicon , physics , resonator
Nanowire-induced SiN photonic crystal (PhC) nanocavities specifically designed for the ultra-violet and visible range are investigated by three-dimensional finite-difference time-domain calculations. As opposed to their silicon PhC counterpart, we find that the formation of nanowire-induced two-dimensional (2D) SiN PhC nanocavities is more challenging because of the low refractive index of SiN. We thus discuss optimization strategies to circumvent such difficulties and we investigate the influence of critical design parameters such as PhC geometry, as well as nanowire geometry and position. We also propose a novel nanowire-induced cavity design based on one-dimensional (1D) nanobeam PhCs. We finally report on nanowire-induced nanocavity designs in 1D (resp. 2D) PhCs presenting quality factors as high as Q c = 5.1 x 10 4 (resp. Q c = 2.5 x 10 4 with a mode volume V m =1.8(λ/nrNW) 3 (resp. V m =5.1(λ/nrNW) 3 ), which show good prospects for light-matter interaction in the near-ultraviolet and visible ranges.